Washing unit for cylindrical cartridge filters



FIG. 1 is a perspective view of a washing unit for cylindrical cartridge filters showing my new design;

FIG. 2 is a right side elevational view thereof, the left side elevational view being a mirror image; and

FIG. 3 is a front elevational view thereof. 

The ornamental design for a washing unit for cylindrical cartridge filters, as shown and described. 